The Bently Nevada 125768-01 is a RIM I/O Module with RS-232/RS-422 Interface for the 3500 series machinery protection system. It serves as the rear I/O card that works in conjunction with the 3500/20 Rack Interface Module (RIM) main card, providing the physical serial communication ports needed for rack configuration, machinery data retrieval, and integration with external communication processors such as TDXnet, TDIX, and DDIX.
Item No :
125768-01Order(MOQ) :
1 PiecePayment :
EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 125768-01 |
| Product Family | 3500 Machinery Protection System |
| Product Type | RIM I/O Module with RS-232/RS-422 Interface |
| Communication Standards | RS-232 / RS-422 serial communications |
| Communication Protocol | Bently Nevada proprietary protocol; Modbus RTU/ASCII |
| Baud Rate | 38.4 k baud maximum (auto baud capable) |
| RS-232 Cable Length | 30 meters (100 feet) maximum |
| RS-422 Cable Length | 1200 meters (4000 feet) maximum |
| Rack Position | Slot 1 (rear slot, behind the 3500/20 RIM main card) |
| Compatible Processors | TDXnet, TDIX, DDIX |
| TMR Support | Yes — performs monitor channel comparison in TMR configurations |
| Configuration Keylock | RUN / PROGRAM mode selector |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Humidity | 95%, non-condensing |
| Dimensions (H x W x D) | 241.3 mm x 24.4 mm x 99.1 mm |
| Weight | 0.45 kg (1.0 lb.) |
| Country of Origin | USA |
| Lifecycle Status | Active / Available as New Surplus |
| Model | Description | Typical Application |
|---|---|---|
| 125768-01 (this model) | RIM I/O Module with RS-232/RS-422 Interface | Rear I/O card for 3500/20 RIM |
| 125744-02 | Standard Rack Interface Module (main card) | Companion front card for standard RIM |
| 125744-01 | TMR Rack Interface Module (main card) | Companion front card for TMR RIM |
| 135031-01 | RIM I/O Module with Modem Interface | Alternative I/O for modem communication |
| 125760-01 | Data Manager I/O Module | Data management for external processors |
| 3500/20-01-02-00 | Complete RIM assembly with 125768-01 I/O | Standard rack communication configuration |
| 3500/20-02-02-00 | Complete TMR RIM assembly with 125768-01 I/O | Triple Modular Redundant applications |
Q1: What is the primary function of the 125768-01?
It is the rear I/O module for the 3500/20 Rack Interface Module (RIM). It provides RS-232 and RS-422 serial communication ports that enable rack configuration, machinery data retrieval, and integration with external communication processors such as TDXnet, TDIX, and DDIX .
Q2: Where should the 125768-01 be installed?
The module must be installed in the rear Slot 1 of the 3500 rack, directly behind the 3500/20 RIM main card. It occupies one full-height rear slot and must be positioned adjacent to the power supply .
Q3: What is the difference between RS-232 and RS-422 cable lengths?
The 125768-01 supports maximum cable lengths of 30 meters (100 feet) for RS-232 and 1200 meters (4000 feet) for RS-422. For longer-distance communication, RS-422 should be selected to prevent signal degradation .
Q4: Does the 125768-01 support Triple Modular Redundancy (TMR)?
Yes. In TMR applications, the 125768-01 (paired with the TMR RIM main card) performs monitor channel comparison — continuously comparing outputs from three redundant monitors and flagging any monitor whose output differs beyond a configured threshold. This ensures system integrity in high-reliability configurations .
Q5: Is the 125768-01 still available?
Yes. The module is listed as Active and available as New Surplus stock through aftermarket suppliers. Multiple distributors show inventory availability with 12-month warranties . The 125768-01 remains a critical spare for existing 3500 series installations.
The Bently Nevada 3500/60-01-00 is a 6-Channel Temperature Monitor for the 3500 Machinery Protection System. The complete configuration consists of the 163179-01 Temperature Monitor (main card) and the 133819-01 RTD/TC I/O Module with internal terminations.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 286566-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53-03-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 133388-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
he Bently Nevada 288062-02 is the Tachometer Module main card for the 3500/50M Tachometer Module in the 3500 Machinery Protection System. It is a dual-channel module that accepts input from proximity probes or magnetic pickups to determine shaft rotational speed, rotor acceleration, and rotor direction.
The Bently Nevada 3500/50M-01-00 is a 2-Channel Tachometer Module for the 3500 Machinery Protection System, configured with the 288062-02 Tachometer main card and the 133442-01 I/O Module with internal terminations. The "M" designation indicates M-series functionality, providing enhanced integration with System 1 diagnostic software.
The Bently Nevada 133442-01 is a dual-channel Tachometer I/O Module with Internal Terminations, designed for the 3500/50 Tachometer Module in the 3500 Machinery Protection System. The module conditions raw pulse signals to determine shaft rotational speed, rotor acceleration, and rotor direction, and can supply conditioned Keyphasor signals to the rack backplane for use by other monitoring modules.
Scan to Wechat :
Scan to WhatsApp :
